spring4.3.5檔案上傳功能

controller:

@Controller
@RequestMapping("/mvc")
public class MvcController {

    @RequestMapping("/hello")
    public String hello(){
        return "hello";
    }
    @RequestMapping(value="/upload",method=RequestMethod.POST)
    public String upload(HttpServletRequest req) throws Exception{
        MultipartHttpServletRequest mreq=(MultipartHttpServletRequest)req;
        MultipartFile file = mreq.getFile("file");
        String fileName = file.getOriginalFilename();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
        FileOutputStream fos = new FileOutputStream(req.getSession().getServletContext().getRealPath("/")+
                "upload/"+sdf.format(new Date())+fileName.substring(fileName.lastIndexOf(".")));
        fos.write(file.getBytes());
        fos.flush();
        fos.close();
        return "helloworld";
    }
}

springmvc-servlet.xml(在src目錄下)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">    
<context:component-scan base-package="test.SpringMVC"></context:component-scan>
<mvc:default-servlet-handler/>
<mvc:annotation-driven></mvc:annotation-driven>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
        id="internalResourceViewResolver">
        <!-- 字首 -->
        <property name="prefix" value="/WEB-INF/jsp/"></property>
        <!-- 字尾 -->
        <property name="suffix" value=".jsp"></property>
</bean>
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize" value="102400000"></property>

</bean>
</beans>           

html表單頁面:

       <form action="mvc/upload" method="post" enctype="multipart/form-data">
           <input type="file" name="file"><br>
           <input type="submit" value="submit">
       </form>

spring在web中的配置

  <servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
     <init-param>
         <param-name>contextConfigLocation</param-name>
         <param-value>classpath:springmvc-servlet.xml</param-value>
     </init-param>
  </servlet>
  <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>/</url-pattern>
  </servlet-mapping>

最後別忘了那些包。